Author Question: The flashlight batteries produced by one of the northern manufacturers are known to have an average ... (Read 15 times)

tspaw0811 · **on:** Mar 25, 2023

Question 1

The closing stock price of Ahmadi, Inc. for a sample of 10 trading days is shown below.

Day	Stock Price
1	84
2	87
3	84
4	88
5	85
6	90
7	91
8	83
9	82
10	86

For the above sample, compute the following measures.

a.	The mean
b.	The median
c.	The mode
d.	The variance
e.	The standard deviation
f.	The range

Question 2

The flashlight batteries produced by one of the northern manufacturers are known to have an average life of 60 hours with a standard deviation of 4 hours. Use Chebyshev’s theorem to answer the following questions.

a.	At least what percentage of flashlights will have a life of 54 to 66 hours?
b.	At least what percentage of the batteries will have a life of 52 to 68 hours?
c.	Determine an interval for the batteries lives that will be true for at least 80% of the batteries. (Hint: First compute the Z-score.)

ludadtpb · **Reply #1 on:** Mar 25, 2023

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